题解 | #牛牛的二三七整除#

package main 
import (
    "fmt"
)
func main () {
    var (
        a int
        flag bool = false
    )
    fmt.Scanf("%d", &a)
    arr := []int{2, 3, 7}
    for i, _ := range arr {
        if a%arr[i] == 0 {
            flag = true
            fmt.Printf("%d ", arr[i])
        }
    }
    if !flag {
        fmt.Println("n")
    }
}